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TitleInnovative landslide change detection monitoring: application of space-borne InSAR techniques in the Thompson River valley, British Columbia, Canada
AuthorHuntley, D; Bobrowsky, P; Charbonneau, F; Journault, J; Macciotta, R; Hendry, M
SourceInternational Consortium on Landslides 4th World Landslide Symposium ; 2017 p. 1-13
Year2017
Alt SeriesEarth Sciences Sector, Contribution Series 20160237
PublisherSpringer
MeetingInternational Consortium on Landslides 4th World Landslide Symposium (WLF4); Ljubljana; SI; May 29 - June 2, 2017
Documentbook
Lang.English
Mediapaper
ProvinceBritish Columbia
NTS82E; 82F/03; 82F/04; 82F/05; 82F/06; 82F/11; 82F/12; 82F/13; 82F/14; 82K/03; 82K/04; 82K/05; 82K/06; 82K/11; 82K/12; 82K/13; 82K/14; 82L; 82M; 82N/03; 82N/04; 82N/05; 82N/06; 82N/11; 82N/12; 82N/13; 82N/14; 92F; 92G; 92H; 92I; 92J; 92K; 92N; 92O; 92P
AreaAshcroft
Lat/Long WENS-126.0000 -117.0000 52.0000 49.0000
Subjectsengineering geology; general geology; geophysics; soils science; surficial geology/geomorphology; landslides; displacement; radar imagery; ground probing radar; tills; glaciolacustrine deposits; erosion; LANDSAT imagery; Railway Infrastructure; RADARSAT-2; LiDAR; InSar
Illustrationssatellite imagery; satellite images; location maps; photographs; graphs; tables
ProgramMarine Geohazards, Public Safety Geoscience
AbstractIn this paper we present the first results from Coherent Points Analyses and Differential Stacking of RADARSAT-2 InSAR persistent scatterer interferograms covering a portion of the Thompson River valley, south of Ashcroft in British Columbia Canada. Surface displacements amounting to less than 5 cm/yr are detected on landslides that are crossed by national railway infrastructure (train tracks and lock-block retaining walls). Our study shows that many landslides in the Thompson River valley have zones of displacement that are more active than others. For the portions of the North Slide, South Slide and Barnard Slide, zones of active displacement can be resolved within the InSAR data acquired between 2013 and 2016. Processes contributing to displacement values include: translational sliding of coherent blocks of till and glaciolacustrine clay, erosion of unconsolidated sediment by surface run-off and gullying, wind-driven deflation and deposition, and anthropogenic activities including cattle grazing practices, temporary storage of composting agricultural materials and storage of aggregate deposits. In contrast, both the Ripley Landslide and Red Hill Slide show marked variations in displacement rates related to seasonal changes in river stage and groundwater level, and compound translational-rotational sliding of coherent blocks of sediment. InSAR techniques effectively capture the surface movement detected by GPS stations, ground-based LiDAR, borehole piezometers and fibre optic installations at the Ripley Landslide test site. This successful application of Coherent Points Analysis and Differential Stacking of persistent scatterer interferograms suggests both techniques are suitable for monitoring unstable terrain in other remote settings where infrastructure, natural resources, the environment, local communities and public safety are at risk.
Summary(Plain Language Summary, not published)
Our study shows that many landslides in the Thompson River valley have zones of displacement that are more active than others. For the portions of the North Slide, South Slide and Barnard Slide, zones of active landslide displacement can be resolved within the InSAR data acquired between 2013 and 2016.
GEOSCAN ID299370